Sport dog field trainer x-series 425 500 yd range FEATURES:-Designed for ease-of-use & no look operation-Up to 500 yd range-21 levels of static stimulation-Waterproof-For dogs 8lbs & up Other Features: 500 yard range, 21 instantly selectable static stimulation levels, low/medium stim ranges , tone & vibration options, rechargeable l-ion batteries expands to 3 dogs with add-a- collar system, waterproof, intuitive, no look operation lets you stay focused on your dog